import echarts from 'echarts';
import Vue from 'vue';
import elementResizeDetectorMaker from "element-resize-detector"

export var version = '0.0.1';
var compatible = (/^2\./).test(Vue.version);
if (!compatible) {
  Vue.util.warn('vue echarts resize directive ' + version + ' only supports Vue 2.x, and does not support Vue ' + Vue.version);
}
let HANDLER = "_vue_echarts_resize_handler"

function bind(el) {
  unbind(el);
  el[HANDLER] = function () {
    let chart = echarts.getInstanceByDom(el);
    if (!chart) {
      return;
    }
    chart.resize();
  }
  //监听window窗体变化，更新echarts大小
  //window.addEventListener("resize", el[HANDLER])
  //监听绑定的div大小变化，更新echarts大小
  elementResizeDetectorMaker().listenTo(el,el[HANDLER])
  
}
function unbind(el) {
  //window.removeEventListener("resize", el[HANDLER]);
  elementResizeDetectorMaker().removeListener(el,el[HANDLER])
  delete el[HANDLER];
}
var directive = {
  bind: bind,
  unbind: unbind
};
Vue.directive("on-echart-resize", directive)
